Abstract:
An apparatus includes a via-fed dual-polarized patch, a first capacitive-fed dual-polarized patch, and a second capacitive-fed dual-polarized patch. The first capacitive-fed dual-polarized patch is capacitively coupled to the via-fed dual-polarized patch through an air gap. The second capacitive-fed dual-polarized patch is capacitively coupled to the first capacitive-fed dual-polarized patch through a dielectric layer.
Abstract:
A hybrid MIMO system comprises N digital transceiver chains and N analog beamformers, each coupled to one of the digital transceiver chains and comprising M analog transmitter (TX) chains and M analog receiver (RX) chains. One of the analog RX chains is an RX reference node and one of the analog TX chains is a TX reference node. A processor is coupled to a calibration transceiver, the transceiver chains, and the beamformers. For each beamformer the processor measures, using the corresponding transceiver chain and the calibration transceiver, TX and RX phase responses and TX and RX magnitude responses of the TX and RX reference nodes, respectively, determines a reciprocity calibration based on a phase difference between the TX and RX phase responses and a magnitude difference between the TX and RX magnitude responses, and applies the reciprocity calibration to stored beam definitions to correct for the phase and magnitude differences.
Abstract:
Scalable 2D joint phase-time arrays (JPTA) support multiple simultaneous RF beams without sacrificing array gain. A 2D JPTA comprises M antenna groups that each comprise N antennas, each coupled to one of N phase shifters. The array comprises M delay elements configured to: apply a time delay to a first signal to be transmitted by one of the antenna groups while each phase shifter in the group phase shifts the time-delayed first signal and feeds the phase-shifted-and-time-delayed first signal to the corresponding antenna, or apply the time delay to a second signal received from the group while each phase shifter phase shifts a third signal received from the antenna, the second signal being a combination of the phase-shifted third signals. The time delays produce a beam spread in a first dimension of the array such that multiple beams are formed in different directions.
Abstract:
An apparatus includes a substrate and a plurality of antenna elements on the substrate and arranged according to an antenna configuration. The antenna configuration includes a rectangular antenna patch, and first and second pairs of circular antenna patches. The first pair of circular antenna patches supports a first angular polarization, wherein the circular antenna patches of the first pair are coupled to opposite corners of the rectangular antenna patch. The second pair of circular antenna patches supports a second angular polarization that is orthogonal to the first angular polarization, wherein the antenna patches of the second pair are coupled to opposite corners of the rectangular antenna patch, wherein each of the antenna patches of the first pair are positioned on corners adjacent to both of the antenna patches of the second pair.
Abstract:
Configuration of a line of sight, multiple input, multiple output circular antenna array involves setting an integer number of antenna arrays up to a number of antenna ports for the circular antenna array and a maximum radius for any antenna ring within the circular antenna array. A capacity is determined for each of a plurality of different combinations of each of: an integer number of antenna rings up to a predetermined maximum number of antenna rings, a number of the antenna arrays for each of the number of antenna rings, and angular offsets for that antenna arrays on each of the antenna rings. The determined capacities for the plurality of different combinations are compared.
Abstract:
A method for operating a large scale antenna array in a wireless communication system includes receiving one or more signals. The one or more signals include information for beamforming to a plurality of user equipments (UEs) using a full-dimensional multiple-input multiple-output (FD-MIMO) beamforming scheme. The FD-MIMO beamforming scheme includes same time resources and same frequency resources that are co-scheduled to the plurality of UEs. The method further includes identifying a time delay of the one or more signals associated with one or more antenna arrays that are distributed in the large scale antenna array and performing a multi-user (MU) joint beamforming on the one or more signals to one or more UEs.
Abstract:
A smart repeater includes a transceiver configured to receive a reference signal, receive, from a base station (BS), a subcarrier allocation for a plurality of user equipments (UEs), receive, from the BS, a downlink (DL) beam associated with the plurality of UEs, and retransmit the DL beam. The smart repeater further includes a processor, operatively coupled to the transceiver, the processor configured to determine a beam split configuration for the DL beam based on the subcarrier allocation, and cause the transceiver to retransmit the DL beam according to the beam split configuration. To retransmit the DL beam according to the beam split configuration the transceiver is further configured to generate a frequency dependent beam for each of the plurality of UEs, and direct the frequency dependent beam for each of the plurality of UEs to a UE associated with the frequency dependent beam.
Abstract:
Methods and apparatuses for facilitating wide bandwidth power amplification with high efficiency for analog RF signals. A passive load modulated balanced amplifier (LMBA) device comprises a balanced power amplifier (BPA) and a directional coupler. The BPA comprises a first power amplifier (PA) configured to amplify a first portion of an input power, a second PA configured to amplify a second portion of the input power, an isolation port, and an output port that outputs the amplified first and second portions of the input power as an output power. The directional coupler is configured to provide a portion of the output power from the output port to the isolation port to modulate a load impedance of the first and second PAs.
Abstract:
A method includes determining one or more delay values and one or more phase shift values for generation of multiple desired frequency-dependent analog beams. The method also includes configuring one or more true-time delay (TTD) elements and one or more phase shifters of a transceiver based on the one or more delay values and the one or more phase shift values, the transceiver having one or more radio-frequency (RF) chains connected to multiple antennas via the one or more TTD elements and the one or more phase shifters. The method also includes operating the transceiver to generate the multiple desired frequency-dependent analog beams.
Abstract:
An apparatus includes a substrate, a first antenna panel, a second antenna panel, and an antenna isolator. The first antenna panel is coupled on the substrate and includes an array of first antenna elements. The second antenna panel is coupled on the substrate and includes an array of second antenna elements. The antenna isolator is coupled on the substrate and including a plurality of walls extending outwardly from the substrate along a length of the substrate between the first antenna panel and the second antenna panel. The antenna isolator reduces reduce wave propagation between the array of first antenna elements and the array of second antenna elements.